summaryrefslogtreecommitdiff
path: root/drivers/media/video/mt9v011.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/video/mt9v011.c')
-rw-r--r--drivers/media/video/mt9v011.c431
1 files changed, 431 insertions, 0 deletions
diff --git a/drivers/media/video/mt9v011.c b/drivers/media/video/mt9v011.c
new file mode 100644
index 000000000000..1fe8fc9183a7
--- /dev/null
+++ b/drivers/media/video/mt9v011.c
@@ -0,0 +1,431 @@
+/*
+ * mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor
+ *
+ * Copyright (c) 2009 Mauro Carvalho Chehab (mchehab@redhat.com)
+ * This code is placed under the terms of the GNU General Public License v2
+ */
+
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <linux/delay.h>
+#include <media/v4l2-device.h>
+#include "mt9v011.h"
+#include <media/v4l2-i2c-drv.h>
+#include <media/v4l2-chip-ident.h>
+
+MODULE_DESCRIPTION("Micron mt9v011 sensor driver");
+MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
+MODULE_LICENSE("GPL");
+
+
+static int debug;
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "Debug level (0-2)");
+
+/* supported controls */
+static struct v4l2_queryctrl mt9v011_qctrl[] = {
+ {
+ .id = V4L2_CID_GAIN,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Gain",
+ .minimum = 0,
+ .maximum = (1 << 10) - 1,
+ .step = 1,
+ .default_value = 0x0020,
+ .flags = 0,
+ }, {
+ .id = V4L2_CID_RED_BALANCE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Red Balance",
+ .minimum = -1 << 9,
+ .maximum = (1 << 9) - 1,
+ .step = 1,
+ .default_value = 0,
+ .flags = 0,
+ }, {
+ .id = V4L2_CID_BLUE_BALANCE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Blue Balance",
+ .minimum = -1 << 9,
+ .maximum = (1 << 9) - 1,
+ .step = 1,
+ .default_value = 0,
+ .flags = 0,
+ },
+};
+
+struct mt9v011 {
+ struct v4l2_subdev sd;
+ unsigned width, height;
+
+ u16 global_gain, red_bal, blue_bal;
+};
+
+static inline struct mt9v011 *to_mt9v011(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct mt9v011, sd);
+}
+
+static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr)
+{
+ struct i2c_client *c = v4l2_get_subdevdata(sd);
+ __be16 buffer;
+ int rc, val;
+
+ rc = i2c_master_send(c, &addr, 1);
+ if (rc != 1)
+ v4l2_dbg(0, debug, sd,
+ "i2c i/o error: rc == %d (should be 1)\n", rc);
+
+ msleep(10);
+
+ rc = i2c_master_recv(c, (char *)&buffer, 2);
+ if (rc != 2)
+ v4l2_dbg(0, debug, sd,
+ "i2c i/o error: rc == %d (should be 2)\n", rc);
+
+ val = be16_to_cpu(buffer);
+
+ v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val);
+
+ return val;
+}
+
+static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr,
+ u16 value)
+{
+ struct i2c_client *c = v4l2_get_subdevdata(sd);
+ unsigned char buffer[3];
+ int rc;
+
+ buffer[0] = addr;
+ buffer[1] = value >> 8;
+ buffer[2] = value & 0xff;
+
+ v4l2_dbg(2, debug, sd,
+ "mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value);
+ rc = i2c_master_send(c, buffer, 3);
+ if (rc != 3)
+ v4l2_dbg(0, debug, sd,
+ "i2c i/o error: rc == %d (should be 3)\n", rc);
+}
+
+
+struct i2c_reg_value {
+ unsigned char reg;
+ u16 value;
+};
+
+/*
+ * Values used at the original driver
+ * Some values are marked as Reserved at the datasheet
+ */
+static const struct i2c_reg_value mt9v011_init_default[] = {
+ { R0D_MT9V011_RESET, 0x0001 },
+ { R0D_MT9V011_RESET, 0x0000 },
+
+ { R0C_MT9V011_SHUTTER_DELAY, 0x0000 },
+ { R09_MT9V011_SHUTTER_WIDTH, 0x1fc },
+
+ { R0A_MT9V011_CLK_SPEED, 0x0000 },
+ { R1E_MT9V011_DIGITAL_ZOOM, 0x0000 },
+ { R20_MT9V011_READ_MODE, 0x1000 },
+
+ { R07_MT9V011_OUT_CTRL, 0x000a }, /* chip enable */
+};
+
+static void set_balance(struct v4l2_subdev *sd)
+{
+ struct mt9v011 *core = to_mt9v011(sd);
+ u16 green1_gain, green2_gain, blue_gain, red_gain;
+
+ green1_gain = core->global_gain;
+ green2_gain = core->global_gain;
+
+ blue_gain = core->global_gain +
+ core->global_gain * core->blue_bal / (1 << 9);
+
+ red_gain = core->global_gain +
+ core->global_gain * core->blue_bal / (1 << 9);
+
+ mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green1_gain);
+ mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green1_gain);
+ mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
+ mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
+}
+
+static void set_res(struct v4l2_subdev *sd)
+{
+ struct mt9v011 *core = to_mt9v011(sd);
+ unsigned vstart, hstart;
+
+ /*
+ * The mt9v011 doesn't have scaling. So, in order to select the desired
+ * resolution, we're cropping at the middle of the sensor.
+ * hblank and vblank should be adjusted, in order to warrant that
+ * we'll preserve the line timings for 30 fps, no matter what resolution
+ * is selected.
+ * NOTE: datasheet says that width (and height) should be filled with
+ * width-1. However, this doesn't work, since one pixel per line will
+ * be missing.
+ */
+
+ hstart = 14 + (640 - core->width) / 2;
+ mt9v011_write(sd, R02_MT9V011_COLSTART, hstart);
+ mt9v011_write(sd, R04_MT9V011_WIDTH, core->width);
+ mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width);
+
+ vstart = 8 + (640 - core->height) / 2;
+ mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart);
+ mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height);
+ mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height);
+};
+
+static int mt9v011_reset(struct v4l2_subdev *sd, u32 val)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++)
+ mt9v011_write(sd, mt9v011_init_default[i].reg,
+ mt9v011_init_default[i].value);
+
+ set_balance(sd);
+ set_res(sd);
+
+ return 0;
+};
+
+static int mt9v011_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+ struct mt9v011 *core = to_mt9v011(sd);
+
+ v4l2_dbg(1, debug, sd, "g_ctrl called\n");
+
+ switch (ctrl->id) {
+ case V4L2_CID_GAIN:
+ ctrl->value = core->global_gain;
+ return 0;
+ case V4L2_CID_RED_BALANCE:
+ ctrl->value = core->red_bal;
+ return 0;
+ case V4L2_CID_BLUE_BALANCE:
+ ctrl->value = core->blue_bal;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int mt9v011_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+ struct mt9v011 *core = to_mt9v011(sd);
+ u8 i, n;
+ n = ARRAY_SIZE(mt9v011_qctrl);
+
+ for (i = 0; i < n; i++) {
+ if (ctrl->id != mt9v011_qctrl[i].id)
+ continue;
+ if (ctrl->value < mt9v011_qctrl[i].minimum ||
+ ctrl->value > mt9v011_qctrl[i].maximum)
+ return -ERANGE;
+ v4l2_dbg(1, debug, sd, "s_ctrl: id=%d, value=%d\n",
+ ctrl->id, ctrl->value);
+ break;
+ }
+
+ switch (ctrl->id) {
+ case V4L2_CID_GAIN:
+ core->global_gain = ctrl->value;
+ break;
+ case V4L2_CID_RED_BALANCE:
+ core->red_bal = ctrl->value;
+ break;
+ case V4L2_CID_BLUE_BALANCE:
+ core->blue_bal = ctrl->value;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ set_balance(sd);
+
+ return 0;
+}
+
+static int mt9v011_enum_fmt(struct v4l2_subdev *sd, struct v4l2_fmtdesc *fmt)
+{
+ if (fmt->index > 0)
+ return -EINVAL;
+
+ fmt->flags = 0;
+ strcpy(fmt->description, "8 bpp Bayer GRGR..BGBG");
+ fmt->pixelformat = V4L2_PIX_FMT_SGRBG8;
+
+ return 0;
+}
+
+static int mt9v011_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
+{
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+ if (pix->pixelformat != V4L2_PIX_FMT_SGRBG8)
+ return -EINVAL;
+
+ v4l_bound_align_image(&pix->width, 48, 639, 1,
+ &pix->height, 32, 480, 1, 0);
+
+ return 0;
+}
+
+static int mt9v011_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
+{
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+ struct mt9v011 *core = to_mt9v011(sd);
+ int rc;
+
+ rc = mt9v011_try_fmt(sd, fmt);
+ if (rc < 0)
+ return -EINVAL;
+
+ core->width = pix->width;
+ core->height = pix->height;
+
+ set_res(sd);
+
+ return 0;
+}
+
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int mt9v011_g_register(struct v4l2_subdev *sd,
+ struct v4l2_dbg_register *reg)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ if (!v4l2_chip_match_i2c_client(client, &reg->match))
+ return -EINVAL;
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ reg->val = mt9v011_read(sd, reg->reg & 0xff);
+ reg->size = 2;
+
+ return 0;
+}
+
+static int mt9v011_s_register(struct v4l2_subdev *sd,
+ struct v4l2_dbg_register *reg)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ if (!v4l2_chip_match_i2c_client(client, &reg->match))
+ return -EINVAL;
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff);
+
+ return 0;
+}
+#endif
+
+static int mt9v011_g_chip_ident(struct v4l2_subdev *sd,
+ struct v4l2_dbg_chip_ident *chip)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_MT9V011,
+ MT9V011_VERSION);
+}
+
+static const struct v4l2_subdev_core_ops mt9v011_core_ops = {
+ .g_ctrl = mt9v011_g_ctrl,
+ .s_ctrl = mt9v011_s_ctrl,
+ .reset = mt9v011_reset,
+ .g_chip_ident = mt9v011_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .g_register = mt9v011_g_register,
+ .s_register = mt9v011_s_register,
+#endif
+};
+
+static const struct v4l2_subdev_video_ops mt9v011_video_ops = {
+ .enum_fmt = mt9v011_enum_fmt,
+ .try_fmt = mt9v011_try_fmt,
+ .s_fmt = mt9v011_s_fmt,
+};
+
+static const struct v4l2_subdev_ops mt9v011_ops = {
+ .core = &mt9v011_core_ops,
+ .video = &mt9v011_video_ops,
+};
+
+
+/****************************************************************************
+ I2C Client & Driver
+ ****************************************************************************/
+
+static int mt9v011_probe(struct i2c_client *c,
+ const struct i2c_device_id *id)
+{
+ u16 version;
+ struct mt9v011 *core;
+ struct v4l2_subdev *sd;
+
+ /* Check if the adapter supports the needed features */
+ if (!i2c_check_functionality(c->adapter,
+ I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
+ return -EIO;
+
+ core = kzalloc(sizeof(struct mt9v011), GFP_KERNEL);
+ if (!core)
+ return -ENOMEM;
+
+ sd = &core->sd;
+ v4l2_i2c_subdev_init(sd, c, &mt9v011_ops);
+
+ /* Check if the sensor is really a MT9V011 */
+ version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
+ if (version != MT9V011_VERSION) {
+ v4l2_info(sd, "*** unknown micron chip detected (0x%04x.\n",
+ version);
+ kfree(core);
+ return -EINVAL;
+ }
+
+ core->global_gain = 0x0024;
+ core->width = 640;
+ core->height = 480;
+
+ v4l_info(c, "chip found @ 0x%02x (%s)\n",
+ c->addr << 1, c->adapter->name);
+
+ return 0;
+}
+
+static int mt9v011_remove(struct i2c_client *c)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(c);
+
+ v4l2_dbg(1, debug, sd,
+ "mt9v011.c: removing mt9v011 adapter on address 0x%x\n",
+ c->addr << 1);
+
+ v4l2_device_unregister_subdev(sd);
+ kfree(to_mt9v011(sd));
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct i2c_device_id mt9v011_id[] = {
+ { "mt9v011", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, mt9v011_id);
+
+static struct v4l2_i2c_driver_data v4l2_i2c_data = {
+ .name = "mt9v011",
+ .probe = mt9v011_probe,
+ .remove = mt9v011_remove,
+ .id_table = mt9v011_id,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 06:19:58 +0000